Sorry I'm a bit late to this thread...
This EXACT thing happened to me post-op... Everything seemed to be healing up fine and then, right when I was hitting the "6 month" mark, my doctor noticed that I had a labial adhesion, thought to have been caused by my skin's super sensitivity (and thus, resulting in granulation). I have always wondered if I did something wrong... not washing enough, not feeling, not -- Oh well, radical acceptance.
My site "overhealed" around the labia and around the clitoris. Yes, at some point, I do need a surgical revision. Can't afford it at this point and have too much going on in life. Sucks. Took me awhile, but I got to the radical acceptance part, so its been "fused" for a year or so... what I thought really SUCKED was having to do weekly silver nitrate treatments to burn away the granulation.
My PCP ended up doing a lot of the treatment and, on accident, she mistook urethral tissue for granulation and burned it away which caused my urethral tissue to "overheal" by stricturing and closing up so that I couldn't pee. So I ended up having my pee hole re-opened by my urologist (thankfully he already knew me from having done my orchie years ago)... not fun... ever since then, I have to self-catheterize when I pee. (Still working on radical acceptance here).